Golf is not a good walk spoiled. It is becoming a good walk prohibited. Show me the common sense in this and I promise I will relent. But there is no common sense at all in the prohibition of walking.
Walking also enables us to watch a hole unfold in front of us. To walk a course is analogous to driving a long distance rather than flying. While driving, we see the country instead of racing over it. There's a human scale that flying cannot offer.